Added expanded parameter

Now you can pass expand parameter to customize the level at which the output switches from the expanded representation to the inline one in YML file
feature #103 Added expanded parameter (markitosgv)

This PR was merged into the 2.3.x-dev branch.

Discussion
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Added expanded parameter

Now you can pass expand parameter to customize the level at which the output switches from the expanded representation to the inline one in YML file

Commits
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d6eba1b Added expanded parameter